frequency control products type dfa s2 siii revision 03 checked ne date 25.02.2006 page 09 stratum iii ultra miniature surface mount tcxo dfa s2-khz (5 v) & lhz (3.3 v) features 10 to 52 mhz stratum iii compliant over -40 to 85c up to 38.88 mhz sonet minimum clock compliant over -40 to 85c up to 52 mhz applications stratum iii and smc function dfa s2 e / d 1 gnd 2 output 3 vcc 4 type dfa s2-khz dfa s2-lhz frequency range 10 to 20 mhz, soon to 38.88 mhz* (bsm & esm up to 52 mhz) standard frequencies 12.8, 16.384, 19 .44, 20, 34.368, 38.88 & 44.736 mhz electrical specifications supply voltage 5 v 5 % 3.3 v 5 % supply current ( no load) 20 ma 10 ma output load hcmos 15 pf or 2 ttl hcmos 15 pf or 2 ttl duty cycle @ 50% level 45/55...55/45 % 45/55...55/45 % rise/fall times (10 to 90 %) 5 ns 5 ns high/low levels or output amplitude 4.5 v/ 0.5 v 2.8 v/ 0.3 v start-up 10 ms @ 4.75 v 10 ms @ 3.15 v tri-state control on pin 1 high or open = enable, low = high z high or open = enable, low = high z frequency stability detailed tolerances [ ppm ] temperature model stability versus : overall holdover 24 hrs calibration type range code temperature vcc 5 % age ing stability stability drift @ 25c telcordia gr-1244 core stratu m iii or itu-t g.813 option 1 0 to 50c as3 0 to 70c bs3 -20 to 70c cs3 all types -40 to 85c es3 0.28 0.1 3 over 15 years 4.6 over 15 years 0.37 0.04 0.8 telcordia gr-253 core smc or itu-t g.813 option 2 0 to 70c bsm all types -40 to 85c esm 3.5 0.3 10 over 20 years 20 over 20 years 4.6 0.5 1 definitions 24 hours drift gr-1244-core, gr-253-core or g.813 24 hours holdover mode over full temperature range and vcc 0.5 % ordering code type + option code + frequency + model code example dfa s2-lhz 19.44 mhz bs3 *please consult factory for availability pc board footprint 4 3 1 5.08 3.20.2 2.4 1.4 2.0 5.30.1 7.20.2 5.08 0.9 2
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